feat: organize project conversations and add coding teacher side chat

tests/unit/coding-workspace-store.test.ts

@@ -306,3 +306,21 @@ describe('coding workspace store', () => {
     expect(store.getState().conversationErrorsByProjectId[secondProject.id]).toBeUndefined();
   });
 });
+
+it('keeps the newer project visible when an earlier activation finishes late', async () => {
+  const second = {...project,id:'project-2',name:'Second'};
+  const delayed = deferred<CodingProjectSummary>();
+  let active = project.id;
+  const store = createCodingWorkspaceStore({
+    listProjects: async () => ({projects:[project,second],activeProjectId:active}),
+    getConfig: async (id) => ({project:id===project.id?project:second,config:config([agent('default')])}),
+    listConversations: async id => [conversation(id+'-chat','default')],
+    setActiveProject: async id => {if(id===project.id)return delayed.promise;active=id;return second;},
+  });
+  await store.getState().load();
+  const old = store.getState().setActiveProject(project.id);
+  const latest = store.getState().setActiveProject(second.id);
+  delayed.resolve(project);await Promise.all([old, latest]);
+  expect(store.getState().activeProjectId).toBe(second.id);
+  expect(store.getState().conversations[0].id).toBe('project-2-chat');
+});